# Reflection at Curved Surface Formulas

General Reflection at Curved Surface Formulas are present here and make the most out of them. Quickly grasp the concepts present and apply the Reflection at Curved Surface Formulae while dealing with related problems. Clarify your doubts by referring to the Formula Sheet of Reflection at Curved Surface. You can get Formulas regarding topics such as Lateral magnification, Newton’s formula, Cartesian sign convention, etc. Grab the opportunity and learn several related concepts by using our Physics Formulas and enhance your subject knowledge.

## List of Reflection at Curved Surface Formulae

P → Pole
F → Focus
C → Centre of Curvature
F = PF → Focal length
R = PC → Radius of Curvature

Aperture → effective diameter of light reflecting area of the mirror.
Mirror Formula →
$$\frac{1}{v}+\frac{1}{u}=\frac{1}{f}$$

u, v and f represents object distance, image distance and focal focal length respectively.

1. Lateral magnification

m = $$\frac{h_{i}}{h_{0}}=-\frac{v}{u}$$

2. Cartesian sign convention

• All distances are measured from the pole (P) and P is the origin.
• Distances measured to the right of the pole are taken as positive.
• Distances above the principal axis are taken as positive.
• Angles measured from the normal in the anticlockwise sense are positive.

3. Newton’s formula

(i) Position of real object and real image are interchangeable. If I1 and I2 is the height of the image

Then, h0 = $$\sqrt{\mathrm{I}_{1} \mathrm{I}_{2}}$$
I1 = –$$\frac{v}{u} h_{0}$$
I2 = –$$\frac{\mathrm{u}}{\mathrm{v}} \mathrm{h}_{\mathrm{o}}$$

(ii) If distance of object and image is measured from focus instead of pole then,
x0yi = f2
Where x0, yi and f are object distance, image distance from the focus and focal length respectively.

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